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Any of the flat sides of a polyhedron.

Each of the operands in a multiplication.

The multiplicative parts of a number: 1 is a factor of every
number, 2 is a factor of every even number. Prime factors are
factors that are prime numbers.

A diagram used to determine the prime factors of a number:

A transformation of geometric figures that results in a mirror image of it.

A number of the form *a/b*: *a* is the numerator,
*b* is the denominator. If the numerator is bigger than
the denominator the fraction is called proper, otherwise
improper. Fractions are a way of representing rational numbers.
A fraction is in the lowest or simplest form if the numerator
and the denominator have non common factors: it is reduced to
lowest terms.

A method used in statistics to record the collected data.

A law that pairs all elements of a set with one and only one
element of another set. Functions can be surjective (onto)
injective, bijective (one-to-one). It is usually written in the
form *y = f(x)* where *x* is the independent
variable, *y* is the dependent variable. The first set is
called the domain, the second set the codomain. The set of all
possible values of the function is called the range (it is
usually a subset of the codomain).

copyright 2000 et seq. maddalena falanga & luciano battaia

first published on september 01 2003 - last updated on september 01
2003